Peek is a small
lunar
Lunar most commonly means "of or relating to the Moon".
Lunar may also refer to:
Arts and entertainment
* ''Lunar'' (series), a series of video games
* "Lunar" (song), by David Guetta
* "Lunar", a song by Priestess from the 2009 album ''Prior t ...
impact crater that is located in the northern part of the
Mare Smythii near the eastern limb of the
Moon. This part of the lunar surface is subject to the effects of
libration
In lunar astronomy, libration is the wagging or wavering of the Moon perceived by Earth-bound observers and caused by changes in their perspective. It permits an observer to see slightly different hemispheres of the surface at different tim ...
, and the crater can be hidden from sight during an unfavorable libration. Even when visible, however, the crater is seen almost edge-on, making it difficult to see much detail from the
Earth. Due to foreshortening the crater appears close to
Schubert, even though the two are about 60 km apart. It lies to the south-southeast of the large crater
Neper
The neper (symbol: Np) is a logarithmic unit for ratios of measurements of physical field and power quantities, such as gain and loss of electronic signals. The unit's name is derived from the name of John Napier, the inventor of logarithms. As ...
.
This crater is generally circular and bowl-shaped, with a small interior floor at the center of the sloping inner walls. The crater has a higher
albedo than the surrounding dark
lunar mare, making it appear slightly brighter than the nearby terrain. The crater has not been significantly eroded by subsequent impacts.
References
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Impact craters on the Moon